PWM测量PWMHigh Side,PHASEPhase 1 Gate Driver IC ControllerConduct at 10% duty cycleVINNeed low Gate charge (nc)Control FETLVOSync. FETCLow Side,Phase NConduct at 90% duty cycle Need low RDS(ON)EfficiencyAccording to Volt-Second balance: (Vin-Vout)*DTs =Vout *(1-D)Ts We can get D = Vout / VinUGATE/LGATEAdaptive Shoot-Through ProtectionMulti-Phase3-Phase 4-PhasePhase VoltagesPhase NodeVout RippleV_out RippleMOSFETThe power dissipation of Mosfet includes two loss components; conduction loss and switching loss. However, only the upper Mosfet has switching losses, since schottky Diode rectifier clamps the switching node before the synchronous rectifier turns on. The gate-changes losses are dissipated by the gate-driver. Large gate charge increases the ……